/*********
*
* This file is part of BibleTime's source code, http://www.bibletime.info/.
*
* Copyright 1999-2008 by the BibleTime developers.
* The BibleTime source code is licensed under the GNU General Public License version 2.0.
*
**********/
#include "csearchdialog.h"
#include "btsearchoptionsarea.h"
#include "btsearchresultarea.h"

#include "backend/cswordmodulesearch.h"
#include "backend/keys/cswordkey.h"
#include "backend/keys/cswordversekey.h"
#include "backend/config/cbtconfig.h"

#include "frontend/cmoduleindexdialog.h"

#include "util/cresmgr.h"
#include "util/ctoolclass.h"
#include "util/directoryutil.h"

//Qt includes
#include <QString>
#include <QWidget>
#include <QMessageBox>
#include <QVBoxLayout>
#include <QLineEdit>
#include <QSettings>
#include <QDialogButtonBox>
#include <QPushButton>
#include <QSizePolicy>
#include <QDebug>

namespace Search {

static CSearchDialog* m_staticDialog = 0;

void CSearchDialog::openDialog(const QList<CSwordModuleInfo*> modules, const QString& searchText, QWidget* parentDialog)
{
	if (!m_staticDialog) {
		m_staticDialog = new CSearchDialog(parentDialog);
	};
	m_staticDialog->reset();

	if (modules.count()) {
		m_staticDialog->setModules(modules);
	}
	else {
		m_staticDialog->showModulesSelector();
	}

	m_staticDialog->setSearchText(searchText);
	if (m_staticDialog->isHidden()) {
		m_staticDialog->show();
	}

	if (modules.count() && !searchText.isEmpty()) {
		m_staticDialog->startSearch();
	}
	// moved these to after the startSearch() because
	// the progress dialog caused them to loose focus.
	m_staticDialog->raise();
	m_staticDialog->activateWindow();
}

CSearchDialog* CSearchDialog::getSearchDialog()
{
	Q_ASSERT(m_staticDialog);
	return m_staticDialog;
}

CSearchDialog::CSearchDialog(QWidget *parent)
	:QDialog(parent), /*m_searchButton(0),*/ m_closeButton(0), 
	m_searchResultArea(0), m_searchOptionsArea(0)
{
	setWindowIcon( util::filesystem::DirectoryUtil::getIcon(CResMgr::searchdialog::icon) );
	setWindowTitle(tr("Search"));
	setAttribute(Qt::WA_DeleteOnClose);
	m_searcher.connectFinished( this, SLOT(searchFinished()));
	initView();
	initConnections();
}

CSearchDialog::~CSearchDialog()
{
	saveDialogSettings();
	m_staticDialog = 0;
}

/** Starts the search with the set modules and the set search text. */
void CSearchDialog::startSearch()
{
	QString originalSearchText(m_searchOptionsArea->searchText());
	QString searchText("");

	if (originalSearchText.isEmpty()) {
		return;
	}

	searchText = prepareSearchText(originalSearchText);

	// Insert search text into history list of combobox
	m_searchOptionsArea->addToHistory(originalSearchText);

	// check that we have the indices we need for searching
	if (!m_searcher.modulesHaveIndices( modules() ) )	{
		int result = QMessageBox::question(this, tr("Missing indices"),
			tr("One or more works need indexing before they can be searched.\n"
			"This could take a long time. Proceed with indexing?"),
		QMessageBox::Yes | QMessageBox::Default,
		QMessageBox::No  | QMessageBox::Escape);
		// In SuSE 10.0 the result is the logical or of the button type, just like it is
		// inputed into the QMessageBox.
		if ( (result == (QMessageBox::Yes | QMessageBox::Default)) ||
			(result == QMessageBox::Yes) || (result == QMessageBox::Default) ) {
			CModuleIndexDialog* dlg = CModuleIndexDialog::getInstance();
			dlg->indexUnindexedModules( modules() );
		}
		else {
			return;
		}
	}

	if (m_searchOptionsArea->hasSearchScope()) {
		m_searcher.setSearchScope( m_searchOptionsArea->searchScope() );
	}
	else {
		m_searcher.resetSearchScope();
	}

	m_searcher.setModules( modules() );
	m_searcher.setSearchedText(searchText);


	//Just to be sure that it can't be clicked again, if the search happens to be a bit slow.
	m_searchOptionsArea->searchButton()->setEnabled(false);
	m_searchOptionsArea->m_searchTextCombo->setEnabled(false);

	m_searcher.startSearch();

	m_searchOptionsArea->searchButton()->setEnabled(true);
	m_searchOptionsArea->m_searchTextCombo->setEnabled(true);
	m_searchOptionsArea->m_searchTextCombo->setFocus();
}

QString CSearchDialog::prepareSearchText(const QString& orig)
{
	qDebug() << "Original search text:" << orig;
	static const QRegExp syntaxCharacters("[+\\-()!\"~]");
	static const QRegExp andWords("\\band\\b", Qt::CaseInsensitive);
	static const QRegExp orWords("\\bor\\b", Qt::CaseInsensitive);
	QString text("");
	if (m_searchOptionsArea->searchType() == BtSearchOptionsArea::AndType) {
		qDebug() << "AND type";
		text = orig.simplified();
		text.remove(syntaxCharacters);
		qDebug() << "After syntax characters removed:" << text;
		text.replace(andWords, "\"and\"");
		text.replace(orWords, "\"or\"");
		qDebug() << "After andor repclaced:" << text;
		text.replace(" ", " AND ");
	}
	if (m_searchOptionsArea->searchType() == BtSearchOptionsArea::OrType) {
		text = orig.simplified();
		text.remove(syntaxCharacters);
		text.replace(andWords, "\"and\"");
		text.replace(orWords, "\"or\"");
	}
	if (m_searchOptionsArea->searchType() == BtSearchOptionsArea::FullType) {
		text = orig;
	}
	qDebug() << "The final search string:" << text;
	return text;
}

/** Starts the search with the given module list and given search text. */
void CSearchDialog::startSearch( const QList<CSwordModuleInfo*> modules, const QString& searchText)
{
	m_searchResultArea->reset();
	m_searchOptionsArea->reset();
	setModules(modules);
	setSearchText(searchText);

	startSearch();
}

/** Returns the list of used modules. */
QList<CSwordModuleInfo*> CSearchDialog::modules() const
{
	return m_searchOptionsArea->modules();
}

/** Sets the list of modules for the search. */
void CSearchDialog::setModules( const QList<CSwordModuleInfo*> modules )
{
	m_searchOptionsArea->setModules(modules);
}

/** Returns the search text which is set currently. */
QString CSearchDialog::searchText() const
{
	return m_searchOptionsArea->searchText();
}

sword::ListKey CSearchDialog::searchScope()
{
	return m_searchOptionsArea->searchScope();
}

/** Sets the search text which is used for the search. */
void CSearchDialog::setSearchText( const QString searchText )
{
	m_searchOptionsArea->setSearchText(searchText);
}

/** Initializes this object. */
void CSearchDialog::initView()
{
	QVBoxLayout* verticalLayout = new QVBoxLayout(this);
	setLayout(verticalLayout);

	m_searchOptionsArea = new BtSearchOptionsArea(this);
	verticalLayout->addWidget(m_searchOptionsArea);

	m_searchResultArea = new BtSearchResultArea(this);
	verticalLayout->addWidget(m_searchResultArea);
	
	QHBoxLayout* horizontalLayout = new QHBoxLayout();

	m_analyseButton = new QPushButton(tr("&Analyze results..."), 0);
	m_analyseButton->setToolTip(tr("Show a graphical analyzis of the search result"));
	QSpacerItem* spacerItem = new QSpacerItem(1, 1, QSizePolicy::Expanding, QSizePolicy::Minimum);
	horizontalLayout->addWidget(m_analyseButton);
	horizontalLayout->addItem(spacerItem);

	m_closeButton = new QPushButton(this);
	m_closeButton->setText(tr("&Close")); 
	m_closeButton->setIcon( util::filesystem::DirectoryUtil::getIcon(CResMgr::searchdialog::close_icon));
	horizontalLayout->addWidget(m_closeButton);

	verticalLayout->addLayout(horizontalLayout);

	loadDialogSettings();
}

void CSearchDialog::searchFinished() {
	if ( m_searcher.foundItems() ) {
		m_searchResultArea->setSearchResult(modules());
	}
	else {
		m_searchResultArea->reset();
	}
	m_staticDialog->raise();
	m_staticDialog->activateWindow();
}

void CSearchDialog::showModulesSelector() {
	m_searchOptionsArea->chooseModules();
}

/** Initializes the signal slot connections */
void CSearchDialog::initConnections() {
	// Search button is clicked
    bool ok = connect(m_searchOptionsArea->searchButton(), SIGNAL(clicked()),this, SLOT(startSearch()));
	Q_ASSERT(ok);
	// Return/Enter is pressed in the search text field
	ok = connect(m_searchOptionsArea, SIGNAL(sigStartSearch()), this, SLOT(startSearch()) );
	Q_ASSERT(ok);
    ok = connect(m_closeButton, SIGNAL(clicked()), this, SLOT(closeButtonClicked()));
	Q_ASSERT(ok);

	connect(m_analyseButton, SIGNAL(clicked()), m_searchResultArea, SLOT(showAnalysis()));

}

/** Resets the parts to the default. */
void CSearchDialog::reset() {
	m_searchOptionsArea->reset();
	m_searchResultArea->reset();
}

void CSearchDialog::closeButtonClicked() {
	// With Qt::WA_DeleteOnClose set, the dialog will be deleted now
	m_staticDialog->close();
}

void CSearchDialog::loadDialogSettings()
{
	resize(CBTConfig::get(CBTConfig::searchDialogWidth), CBTConfig::get(CBTConfig::searchDialogHeight));
	move(CBTConfig::get(CBTConfig::searchDialogX), CBTConfig::get(CBTConfig::searchDialogY));
}

void CSearchDialog::saveDialogSettings()
{
	CBTConfig::set(CBTConfig::searchDialogWidth, size().width());
	CBTConfig::set(CBTConfig::searchDialogHeight, size().height());
	CBTConfig::set(CBTConfig::searchDialogX, x());
	CBTConfig::set(CBTConfig::searchDialogY, y());
}


} //end of namespace Search
